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Information received on 24/04/2015 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

The affected premises was a small backyard mixed flock of ducks and chickens that were allowed access to the outdoors.

Outbreak 2 (59)

Swift County, Swift, MINNESOTA

Date of start of the outbreak

10/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

160000

160000

Affected population

A commercial turkey flock.

Outbreak 3 (60)

Stearns County 5, Stearns, MINNESOTA

Date of start of the outbreak

10/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

76000

76000

Affected population

A commercial turkey flock.

Outbreak 4 (58)

Le Sueur County, Le Sueur, MINNESOTA

Date of start of the outbreak

10/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

21500

21500

Affected population

A commercial turkey flock.

Outbreak 5 (65)

Meeker County 3, Meeker, MINNESOTA

Date of start of the outbreak

10/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

20000

20000

Affected population

A commercial turkey flock.

Outbreak 6 (56)

St. Charles County, St. Charles, MISSOURI

Date of start of the outbreak

10/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Not applicable

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Snow Goose:Anser caerulescens(Anatidae)

Affected population

Wild bird surveillance.

Outbreak 7 (63)

Meeker County 2, Meeker, MINNESOTA

Date of start of the outbreak

11/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

25000

Affected population

A commercial turkey flock.

Outbreak 8 (61)

Swift County 2, Swift, MINNESOTA

Date of start of the outbreak

11/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

154000

154000

Affected population

A commercial turkey flock.

Outbreak 9 (62)

Redwood County, Redwood, MINNESOTA

Date of start of the outbreak

11/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

56000

56000

Affected population

A commercial turkey flock.

Outbreak 10 (75)

Buena Vista County, Buena Vistaa, IOWA

Date of start of the outbreak

12/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

27000

27000

Affected population

A commercial turkey flock.

Outbreak 11 (76)

Roberts County, Roberts, SOUTH DAKOTA

Date of start of the outbreak

12/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

69000

69000

Affected population

A commercial turkey flock.

Outbreak 12 (64)

Kandiyohi County 4, Kandiyohi, MINNESOTA

Date of start of the outbreak

12/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

30000

30000

Affected population

A commercial turkey flock.

Outbreak 13 (66)

Otter Tail County, Otter Tail, MINNESOTA

Date of start of the outbreak

13/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

21000

Affected population

A commercial turkey flock.

Outbreak 14 (67)

Stearns County 6, Stearns, MINNESOTA

Date of start of the outbreak

13/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

67000

67000

Affected population

A commercial turkey flock.

Outbreak 15 (69)

Roseau County, Roseau, MINNESOTA

Date of start of the outbreak

13/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

26000

Affected population

A commercial turkey flock.

Outbreak 16 (68)

Kandiyohi County 5, Kandiyohi, MINNESOTA

Date of start of the outbreak

13/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

152000

152000

Affected population

A commercial turkey flock.

Outbreak 17 (57)

Barron County, Barron, WISCONSIN

Date of start of the outbreak

14/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

126650

126650

Affected population

A commercial turkey flock.

Outbreak 18 (70)

Kandiyohi County 6, Kandiyohi, MINNESOTA

Date of start of the outbreak

15/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

23000

Affected population

A commercial turkey flock.

Outbreak 19 (77)

Spink County, Spink, SOUTH DAKOTA

Date of start of the outbreak

16/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

35100

35100

Affected population

A commercial turkey flock.

Outbreak 20 (74)

Cottonwood County 2, Cottonwood, MINNESOTA

Date of start of the outbreak

16/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

30000

Affected population

A commercial turkey flock.

Outbreak 21 (79)

Osceola County, Osceolla, IOWA

Date of start of the outbreak

16/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

4034000

Affected population

A commercial chicken table egg layer flock.

Outbreak 22 (71)

Kandiyohi County 8, Kandiyohi, MINNESOTA

Date of start of the outbreak

16/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

9000

Affected population

A commercial turkey flock.

Outbreak 23 (73)

Wadena County, Wadena, MINNESOTA

Date of start of the outbreak

16/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

301000

Affected population

A commercial turkey flock.

Outbreak 24 (72)

Kandiyohi County 9, Kandiyohi, MINNESOTA

Date of start of the outbreak

17/04/2015

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

61000

Affected population

A commercial turkey flock.

Summary of outbreaks

Total outbreaks: 24

Total animals affected

Species

Susceptible

Cases

Deaths

Destroyed

Slaughtered

Birds

5524283

**

994283

Snow Goose:Anser caerulescens(Anatidae)

**

Outbreak statistics

Species

Apparent morbidity rate

Apparent mortality rate

Apparent case fatality rate

Proportion susceptible animals lost*

Birds

**

**

**

**

Snow Goose:Anser caerulescens(Anatidae)

**

**

**

**

*Removed from the susceptible population through death, destruction and/or slaughter

**Not calculated because of missing information

Epidemiology

Source of the outbreak(s) or origin of infection

Contact with wild species

Epidemiological comments

The USDA Animal and Plant Health Inspection Service (APHIS), in conjunction with State Departments of Agriculture and Wildlife, are continuing to conduct a comprehensive epidemiological investigation and enhanced surveillance (including wild bird surveillance of hunter harvested birds) in response to the HPAI H5N8 and H5N2 wild bird related events. Novel avian influenza virus of Eurasian origin (EA-H5N8 clade 2.3.4.4) spread rapidly along wild bird migratory pathways during 2014. Introduction of this EA-H5N8 virus into the Pacific Flyway sometime during 2014 has allowed mixing with North American (AM) lineage viruses and generated new combinations with genes from both EA and AM origin (or “reassortant” viruses) such as this EA/AM H5N2-reassortant detected in the US. In addition, overlap of the Pacific, Central, and Mississippi Americas flyways has resulted in movement of the virus to the central part of the country. The EA-H5 clade 2.3.4.4 viruses are highly pathogenic for poultry.

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